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Analysis on the Water Circulation and Water Quality Improvement Effect of Low Impact Development Techniques by Test-Bed Monitoring
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 Title & Authors
Analysis on the Water Circulation and Water Quality Improvement Effect of Low Impact Development Techniques by Test-Bed Monitoring
Ko, Hyugbae; Choi, Hanna; Lee, Yunkyu; Lee, Chaeyoung;
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Low Impact Development (LID) techniques are eco-friendly storm water management process for water circulation restoration and non-point pollutant reduction. In this study, four LID techniques (Small constructed wetland, Infiltration trench box, Infiltration trench, Vegetated swale) were selected and installed as a real size at the real site. All facilities were evaluated as monitoring under the real environmental climate situation and an artificial rain with exceeding design rainfall. In various rainfall, runoff reduction efficiency and non-point pollutant removal efficiency are increased to the bigger Surface Area of LID (SA)/Catchment Area (CA) ratio and the bigger Storage Volume of LID (SV)/Catchment Area (CA) ratio. Runoff did not occur at all rainfall event (max. 17.2 mm) in infiltration trench and vegetated swale. But Small constructed wetland was more efficient at less than 10 mm, a efficiency of infiltration trench box was similar at different rainfall. Although different conditions (such as structural material of LID, rainfall flow rate, antecedent dry periods), LID techniques are good effects not only water circulation improvement but also water quality improvement.
LID;Water circulation;Non-point pollutant;Rainfall runoff;Storm water management;
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